[RELEASE] Released version 2.1.12

[RELEASE] Released version 2.1.12

Released version 2.1.12 with the following main changes :
    - BUG/MINOR: sample: check alloc_trash_chunk return value in concat()
    - BUG/MINOR: sample: Memory leak of sample_expr structure in case of error
    - BUG/MINOR: init: enforce strict-limits when using master-worker
    - BUG/MINOR: init: Use a dynamic buffer to set HAPROXY_CFGFILES env variable
    - BUG/MINOR: threads: Fixes the number of possible cpus report for Mac.
    - BUG/MINOR: peers: Wrong "new_conn" value for "show peers" CLI command.
    - BUG/MINOR: mux_h2: missing space between "st" and ".flg" in the "show fd" helper
    - BUG/MINOR: mworker: define _GNU_SOURCE for strsignal()
    - BUG/MEDIUM: mux-h2: fix read0 handling on partial frames
    - BUILD/MINOR: lua: define _GNU_SOURCE for LLONG_MAX
    - BUG/MEDIUM: stats: add missing INF_BUILD_INFO definition
    - BUG/MEDIUM: filters/htx: Fix data forwarding when payload length is unknown
    - BUG/MINOR: config: fix leak on proxy.conn_src.bind_hdr_name
    - MINOR: contrib: Make the wireshark peers dissector compile for more distribs.
    - DOC: management: fix "show resolvers" alphabetical ordering
    - BUG/MINOR: stick-table: Always call smp_fetch_src() with a valid arg list
    - BUG/MEDIUM: ssl: check a connection's status before computing a handshake
    - BUG/MINOR: xxhash: make sure armv6 uses memcpy()
    - BUG/MINOR: ssl: init tmp chunk correctly in ssl_sock_load_sctl_from_file()
    - BUG/MEDIUM: ssl/cli: abort ssl cert is freeing the old store
    - BUILD: Makefile: move REGTESTST_TYPE default setting
    - BUG/MEDIUM: mux-h2: handle remaining read0 cases
    - BUG/MEDIUM: mux-h2: do not quit the demux loop before setting END_REACHED
    - BUG/MINOR: http-ana: Don't increment HTTP error counter on internal errors
    - BUG/MEDIUM: mux-h1: Always set CS_FL_EOI for response in MSG_DONE state
    - BUG/MINOR: server: re-align state file fields number
    - BUG/MINOR: tools: Fix a memory leak on error path in parse_dotted_uints()
    - BUG/MINOR: backend: hold correctly lock when killing idle conn
    - BUG/MINOR: server: Fix server-state-file-name directive
    - CLEANUP: deinit: release global and per-proxy server-state variables on deinit
    - BUG/MEDIUM: config: don't pick unset values from last defaults section
    - BUG/MINOR: stats: revert the change on ST_CONVDONE
    - BUG/MINOR: cfgparse: do not mention "addr:port" as supported on proxy lines
    - BUG/MINOR: server: Don't call fopen() with server-state filepath set to NULL
    - CLEANUP: channel: fix comment in ci_putblk.
    - BUG/MINOR: server: Remove RMAINT from admin state when loading server state
    - BUG/MINOR: session: atomically increment the tracked sessions counter
    - BUG/MINOR: checks: properly handle wrapping time in __health_adjust()
    - BUG/MINOR: sample: Always consider zero size string samples as unsafe
    - BUG/MINOR: server: Init params before parsing a new server-state line
    - BUG/MINOR: server: Be sure to cut the last parsed field of a server-state line
    - BUG/MEDIUM: mux-h1: Fix handling of responses to CONNECT other than 200-ok
    - BUG/MINOR: ssl/cli: potential null pointer dereference in "set ssl cert"
    - BUG/MINOR: sample: secure convs that accept base64 string and var name as args
    - BUG/MEDIUM: vars: make functions vars_get_by_{name,desc} thread-safe
    - BUG/MEDIUM: proxy: use thread-safe stream killing on hard-stop
    - BUG/MEDIUM: cli/shutdown sessions: make it thread-safe
    - BUG/MINOR: proxy: wake up all threads when sending the hard-stop signal
    - BUG/MINOR: resolvers: new callback to properly handle SRV record errors
    - BUG/MEDIUM: resolvers: Reset server address and port for obselete SRV records
    - BUG/MEDIUM: resolvers: Reset address for unresolved servers
    - BUG/MINOR: mux-h1: Immediately report H1C errors from h1_snd_buf()
    - BUG/MINOR: http-ana: Only consider dst address to process originalto option
    - BUG/MINOR: tcp-act: Don't forget to set the original port for IPv4 set-dst rule
    - BUG/MINOR: connection: Use the client's dst family for adressless servers
    - BUG/MEDIUM: spoe: Kill applets if there are pending connections and nbthread > 1
    - DOC: spoe: Add a note about fragmentation support in HAProxy
    - BUG/MINOR: mux-h2: Fix typo in scheme adjustment
    - BUG/MINOR: http-ana: Don't increment HTTP error counter on read error/timeout
    - BUG/MEDIUM: dns: Consider the fact that dns answers are case-insensitive
    - BUG/MEDIUM: lists: Lock the element while we check if it is in a list.
    - BUG/MEDIUM: lists: Avoid an infinite loop in MT_LIST_TRY_ADDQ().
    - BUG/MINOR: hlua: Don't strip last non-LWS char in hlua_pushstrippedstring()
    - BUG/MINOR: ssl: don't truncate the file descriptor to 16 bits in debug mode
    - BUG/MEDIUM: session: NULL dereference possible when accessing the listener
    - BUG/MEDIUM: filters: Set CF_FL_ANALYZE on channels when filters are attached
    - BUG/MINOR: proxy/session: Be sure to have a listener to increment its counters
    - BUG/MINOR: session: Add some forgotten tests on session's listener
    - CLEANUP: tcp-rules: add missing actions in the tcp-request error message
    - BUG/MINOR: resolvers: Consider server to have no IP on DNS resolution error
    - BUG/MINOR: resolvers: Reset server address on DNS error only on status change
    - BUG/MINOR: resolvers: Add missing case-insensitive comparisons of DNS hostnames
    - MINOR: time: export the global_now variable
    - BUG/MINOR: freq_ctr/threads: make use of the last updated global time
    - MINOR: version: Set the EOL of the 2.1 branch